What's the main reason behind this? Researchers say grown children who are "struggling to achieve financial independence" have become part of their parent's financial responsibility. The study cites the Great Recession and low employment figures as factors for young adults' unsuccessful job retainment. (A 2012 study noted youths were often underemployed, still living at home and had it harder than their parents.)

The "sandwich generation," as the study calls the breadwinners, is mostly composed of middle-aged adults reaching into their pockets to help out a parent, 65 or older, while they support a dependent child.

Hispanics are more likely than blacks and whites to be part of this demographic. The study notes 21 percent of Latinos are providing assistance to a parent and supporting a child. That's compared to 8 percent of blacks and 5 percent of whites.

The figure for the growing trend bumped up 2 percentage points from 2005, for a total of 15 percent.